﻿using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApp3
{
    class Arrayutil
    {
        public static void Anull()
        {
            Boolean arr;
            Console.WriteLine("请输入：");
            string a = Console.ReadLine();


            if (string.IsNullOrWhiteSpace(a))
            {
              arr = true;
            }
            else
            {
               arr = false;
            }
        }
    }
}
